4f+0.5-0.2f=8.1

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Solution for 4f+0.5-0.2f=8.1 equation: 



4f+0.5-0.2f=8.1

We move all terms to the left:

4f+0.5-0.2f-(8.1)=0

We add all the numbers together, and all the variables

3.8f-7.6=0

We move all terms containing f to the left, all other terms to the right

3.8f=7.6

f=7.6/3.8

f=2

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